39 lines
1.5 KiB
Markdown
39 lines
1.5 KiB
Markdown
---
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layout: page
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title: "MQTT Birth and Last will"
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description: "Instructions how to setup MQTT birth and last will messages within Home Assistant."
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date: 2015-08-07 18:00
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sidebar: true
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comments: false
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sharing: true
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footer: true
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logo: mqtt.png
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---
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MQTT supports so-called Birth and Last Will and Testament (LWT) messages. The former is used to send a message after the service has started, and the latter is used to notify other clients about an ungracefully disconnected client.
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To integrate MQTT Birth and Last Will messages into Home Assistant, add the following section to your `configuration.yaml` file:
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```yaml
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# Example configuration.yaml entry
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mqtt:
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birth_message:
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topic: 'hass/status'
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payload: 'online'
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will_message:
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topic: 'hass/status'
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payload: 'offline'
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```
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Configuration variables:
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- **birth_message** (*Optional*):
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- **topic** (*Required*): The MQTT topic to publish the message.
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- **payload** (*Required*): The message content.
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- **qos** (*Optional*): The maximum QoS level of the topic. Default is 0.
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- **retain** (*Optional*): If the published message should have the retain flag on or not. Defaults to `True`.
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- **will_message** (*Optional*):
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- **topic** (*Required*): The MQTT topic to publish the message.
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- **payload** (*Required*): The message content.
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- **qos** (*Optional*): The maximum QoS level of the topic. Default is 0.
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- **retain** (*Optional*): If the published message should have the retain flag on or not. Defaults to `True`.
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